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BlackZzzverrR [31]
3 years ago
5

Why is the earth often referred to as the blue planet

Chemistry
2 answers:
Vilka [71]3 years ago
7 0

Most of the surface of the earth is covered with water and looks blue from space.

adoni [48]3 years ago
3 0
Since most of the planet is covered with water thats why it is referred to the blue planet
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which of the following testable questions will provide evidence that elements in the same group have similar properties?
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<h3>What is the valency?</h3>

In essence, how many electrons are present in their outermost shell.

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  • Complete question here:

which of the following testable questions will provide evidence that elements in the same group have similar properties A. Valency B. Orbit C. Group D. Period

Since, the reactive capacities of elements is dependent on the number of electrons on its outermost shell, we can conclude on this note that, Elements in the same group have similar properties.

Learn more on Groups and Valency:

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An atom x contains 14 protons, 13 electrons, and 12 neutrons, and atom y contains 14 protons, 14 electrons, and 12 neutrons. wha
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<span>a. x and y are atoms of the same element. 

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